Granted Patent
Utility
US 4,399,992 · App. 06/128,543
Structural member having a high strength to weight ratio and method of making same
Inventor:
Robert P. Molitor
Patented Case
View Patent ↗
Granted: Aug 23, 1983
Filed: Mar 10, 1980
Inventor
Robert P. Molitor
Assignee (at issue)
Questor Corp.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.